About: http://webisa.webdatacommons.org/100736830

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	These pyridylium salts can comply with the formula: ##STR5## in which R2 has the meaning given hereinbefore, R7 is a C1 to C4 alkyl radical and A- is an anion chosen from among Cl-, Br- and I-.
http://www.w3.org/ns/prov#wasQuotedFrom	google.nl